FDO and LTO on ARM

[Mike Hommey]

On Mon, Aug 08, 2011 at 05:25:23PM +0100, Jonathan Wakely wrote:
> On 8 August 2011 13:20, Mike Hommey wrote:
> >
> > I unfortunately hit several problems with gcc 4.7 (latest snapshot).
> > One is bug 50022 that I filed today.
> >
> > Another is the following error in stlport headers:
> > Â error: invalid use of incomplete type 'std::string {aka struct
> > Â std::basic_string<char, std::char_traits<char>, std::allocator<char> >}'
> >
> > I also tried GNU libstdc++ instead of stlport but I hit some other
> > errors that boil down to the following:
> > Â error: 'std::wstring' has not been declared
> 
> They both look as though they could be caused by something as simple
> as failing to include <string> rather than a problem in GCC.  Could
> you send me more context for the errors (offlist if you prefer)?  I'll
> see if it's something we've changed in libstdc++, though given that
> STlport fails too it seems unlikely.

I identified the libstdc++ failure as a problem when building gcc:

configure:16321:  /tmp/build-ndk/gcc-4.7.0/./gcc/xgcc -shared-libgcc -B/tmp/build-ndk/gcc-4.7.0/./gcc -nostdinc++ -L/tmp/build-ndk/gcc-4.7.0/arm-linux-androideabi/libstdc++-v3/src -L/tmp/build-ndk/gcc-4.7.0/arm-linux-androideabi/libstdc++-v3/src/.libs -B/tmp/android-ndk-r6/toolchains/arm-linux-androideabi-4.7.0/prebuilt/linux-x86/arm-linux-androideabi/bin/ -B/tmp/android-ndk-r6/toolchains/arm-linux-androideabi-4.7.0/prebuilt/linux-x86/arm-linux-androideabi/lib/ -isystem /tmp/android-ndk-r6/toolchains/arm-linux-androideabi-4.7.0/prebuilt/linux-x86/arm-linux-androideabi/include -isystem /tmp/android-ndk-r6/toolchains/arm-linux-androideabi-4.7.0/prebuilt/linux-x86/arm-linux-androideabi/sys-include    -c -frtti -fexceptions -O2 -Os -g -DTARGET_POSIX_IO -fno-short-enums  conftest.cpp >&5
conftest.cpp:35:18: error: 'INT_MIN' was not declared in this scope
conftest.cpp:36:18: error: 'INT_MAX' was not declared in this scope
(snip)
configure:16345: checking for enabled wchar_t specializations
configure:16347: result: no

Thus _GLIBCXX_USE_WCHAR_T is not defined, and as such, the typedef
for wstring isn't either.

I'll retry stlport and see if it's not something similar.

Mike